[lustre-devel] [PATCH 03/28] lustre: obd_type: use typ_kobj.name as typ_name

[NeilBrown <neilb@suse.com>]

As the kobject has a name (after kobject_add has been called),
we don't need to also store it in typ_name.
So use typ_kobj.name instead of typ_name.

This requires changing some "char *" to "const char *" as
typ.kobj.name is const.

Reviewed-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: NeilBrown <neilb@suse.com>
---
 drivers/staging/lustre/lustre/include/lustre_net.h |    4 ++-
 drivers/staging/lustre/lustre/include/obd.h        |    2 +-
 drivers/staging/lustre/lustre/include/obd_class.h  |    2 +-
 drivers/staging/lustre/lustre/ldlm/ldlm_lib.c      |    2 +-
 drivers/staging/lustre/lustre/obdclass/genops.c    |   25 ++++++++------------
 drivers/staging/lustre/lustre/ptlrpc/client.c      |    2 +-
 6 files changed, 16 insertions(+), 21 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/lustre_net.h b/drivers/staging/lustre/lustre/include/lustre_net.h
index f6d1be1a8350..1cf0f127203a 100644
--- a/drivers/staging/lustre/lustre/include/lustre_net.h
+++ b/drivers/staging/lustre/lustre/include/lustre_net.h
@@ -308,7 +308,7 @@ struct ptlrpc_client {
 	/** What portal do we expect replies on */
 	u32			cli_reply_portal;
 	/** Name of the client */
-	char			*cli_name;
+	const char		*cli_name;
 };
 
 /** state flags of requests */
@@ -1817,7 +1817,7 @@ void ptlrpc_request_committed(struct ptlrpc_request *req, int force);
 int ptlrpc_inc_ref(void);
 void ptlrpc_dec_ref(void);
 
-void ptlrpc_init_client(int req_portal, int rep_portal, char *name,
+void ptlrpc_init_client(int req_portal, int rep_portal, const char *name,
 			struct ptlrpc_client *);
 struct ptlrpc_connection *ptlrpc_uuid_to_connection(struct obd_uuid *uuid,
 						    lnet_nid_t nid4refnet);
diff --git a/drivers/staging/lustre/lustre/include/obd.h b/drivers/staging/lustre/lustre/include/obd.h
index f20c2468712a..6bf052a5ac5a 100644
--- a/drivers/staging/lustre/lustre/include/obd.h
+++ b/drivers/staging/lustre/lustre/include/obd.h
@@ -103,12 +103,12 @@ struct obd_type {
 	struct obd_ops		*typ_dt_ops;
 	struct md_ops		*typ_md_ops;
 	struct dentry		*typ_debugfs_entry;
-	char			*typ_name;
 	int			 typ_refcnt;
 	struct lu_device_type	*typ_lu;
 	spinlock_t		 obd_type_lock;
 	struct kobject		 typ_kobj;
 };
+#define typ_name typ_kobj.name
 
 struct brw_page {
 	u64			off;
diff --git a/drivers/staging/lustre/lustre/include/obd_class.h b/drivers/staging/lustre/lustre/include/obd_class.h
index e4cde1971e33..bf6ce3284bef 100644
--- a/drivers/staging/lustre/lustre/include/obd_class.h
+++ b/drivers/staging/lustre/lustre/include/obd_class.h
@@ -75,7 +75,7 @@ int class_name2dev(const char *name);
 struct obd_device *class_name2obd(const char *name);
 int class_uuid2dev(struct obd_uuid *uuid);
 struct obd_device *class_find_client_obd(struct obd_uuid *tgt_uuid,
-					 const char *typ_name,
+					 const char *type_name,
 					 struct obd_uuid *grp_uuid);
 struct obd_device *class_devices_in_group(struct obd_uuid *grp_uuid,
 					  int *next);
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
index e0d2851accef..9c61b332a51c 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
@@ -247,7 +247,7 @@ int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
 	struct obd_import *imp;
 	struct obd_uuid server_uuid;
 	int rq_portal, rp_portal, connect_op;
-	char *name = obddev->obd_type->typ_name;
+	const char *name = obddev->obd_type->typ_name;
 	enum ldlm_ns_type ns_type = LDLM_NS_TYPE_UNKNOWN;
 	struct ptlrpc_connection fake_conn = {
 		.c_self = 0,
diff --git a/drivers/staging/lustre/lustre/obdclass/genops.c b/drivers/staging/lustre/lustre/obdclass/genops.c
index 8dd217c888a5..8f683313acf2 100644
--- a/drivers/staging/lustre/lustre/obdclass/genops.c
+++ b/drivers/staging/lustre/lustre/obdclass/genops.c
@@ -157,7 +157,6 @@ static void class_sysfs_release(struct kobject *kobj)
 	list_del(&type->typ_chain);
 	spin_unlock(&obd_types_lock);
 
-	kfree(type->typ_name);
 	kfree(type->typ_md_ops);
 	kfree(type->typ_dt_ops);
 	kfree(type);
@@ -216,28 +215,24 @@ int class_register_type(struct obd_ops *dt_ops, struct md_ops *md_ops,
 
 	type->typ_dt_ops = kzalloc(sizeof(*type->typ_dt_ops), GFP_NOFS);
 	type->typ_md_ops = kzalloc(sizeof(*type->typ_md_ops), GFP_NOFS);
-	type->typ_name = kzalloc(strlen(name) + 1, GFP_NOFS);
 
 	if (!type->typ_dt_ops ||
-	    !type->typ_md_ops ||
-	    !type->typ_name)
+	    !type->typ_md_ops)
 		goto failed;
 
 	*type->typ_dt_ops = *dt_ops;
 	/* md_ops is optional */
 	if (md_ops)
 		*type->typ_md_ops = *md_ops;
-	strcpy(type->typ_name, name);
 	spin_lock_init(&type->obd_type_lock);
 
-	type->typ_debugfs_entry = debugfs_create_dir(type->typ_name,
-						     debugfs_lustre_root);
-
 	rc = kobject_add(&type->typ_kobj, &lustre_kset->kobj, "%s", name);
-
 	if (rc)
 		goto failed;
 
+	type->typ_debugfs_entry = debugfs_create_dir(type->typ_name,
+						     debugfs_lustre_root);
+
 	if (ldt) {
 		type->typ_lu = ldt;
 		rc = lu_device_type_init(ldt);
@@ -564,7 +559,7 @@ struct obd_device *class_num2obd(int num)
  * otherwise any client connected to the tgt is returned.
  */
 struct obd_device *class_find_client_obd(struct obd_uuid *tgt_uuid,
-					 const char *typ_name,
+					 const char *type_name,
 					 struct obd_uuid *grp_uuid)
 {
 	int i;
@@ -575,8 +570,8 @@ struct obd_device *class_find_client_obd(struct obd_uuid *tgt_uuid,
 
 		if (!obd)
 			continue;
-		if ((strncmp(obd->obd_type->typ_name, typ_name,
-			     strlen(typ_name)) == 0)) {
+		if ((strncmp(obd->obd_type->typ_name, type_name,
+			     strlen(type_name)) == 0)) {
 			if (obd_uuid_equals(tgt_uuid,
 					    &obd->u.cli.cl_target_uuid) &&
 			    ((grp_uuid) ? obd_uuid_equals(grp_uuid,
@@ -1388,7 +1383,7 @@ EXPORT_SYMBOL(obd_get_max_rpcs_in_flight);
 int obd_set_max_rpcs_in_flight(struct client_obd *cli, u32 max)
 {
 	struct obd_request_slot_waiter *orsw;
-	const char *typ_name;
+	const char *type_name;
 	u32 old;
 	int diff;
 	int rc;
@@ -1397,8 +1392,8 @@ int obd_set_max_rpcs_in_flight(struct client_obd *cli, u32 max)
 	if (max > OBD_MAX_RIF_MAX || max < 1)
 		return -ERANGE;
 
-	typ_name = cli->cl_import->imp_obd->obd_type->typ_name;
-	if (!strcmp(typ_name, LUSTRE_MDC_NAME)) {
+	type_name = cli->cl_import->imp_obd->obd_type->typ_name;
+	if (!strcmp(type_name, LUSTRE_MDC_NAME)) {
 		/*
 		 * adjust max_mod_rpcs_in_flight to ensure it is always
 		 * strictly lower that max_rpcs_in_flight
diff --git a/drivers/staging/lustre/lustre/ptlrpc/client.c b/drivers/staging/lustre/lustre/ptlrpc/client.c
index eb5d22a538a0..da1ccd8f9dcc 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/client.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/client.c
@@ -67,7 +67,7 @@ static int ptlrpc_unregister_reply(struct ptlrpc_request *request, int async);
 /**
  * Initialize passed in client structure @cl.
  */
-void ptlrpc_init_client(int req_portal, int rep_portal, char *name,
+void ptlrpc_init_client(int req_portal, int rep_portal, const char *name,
 			struct ptlrpc_client *cl)
 {
 	cl->cli_request_portal = req_portal;